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Common Radar Materials and their Scale Model Equivalents

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Radar Material	Radar Freq.	Dielectric Constant	Radar Reflect.	Scale Model Material	Sub-mm Freq.	Dielectric Constant	Sub-mm Reflect.
Polyethylene	10 GHz	2.38 + i 0.0012	4.6%	HD Polyethylene	160 GHz	2.32 + i 0.0007	4.3%
Teflon	35 GHz	2.01 + i 0.0004	3.0%	Teflon	520 GHz	1.96 + i 0.003	2.8%
Nylon	10 GHz	3.12 + i 0.008	7.7%	Mylar	520 GHz	2.99 + i 0.083	7.1%
Plexiglass	25 GHz	2.59 + i 0.017	5.5%	Rexolite	520 GHz	2.50 + i 0.009	5.1%

Snow	3 GHz	1.20 + i 0.0003	0.2%	Polystyrene Foam	520 GHz	1.25 + i 0.0007	0.3%
Ice	3 GHz	3.2 + i 0.0009	8.0%	loaded plastic	160 GHz	3.20 + i 0.071	8.0%
Soil (loamy dry)	3 GHz	2.44 + i 0.001	4.8%	loaded plastic	520 GHz	2.66 + i 0.065	5.8%
Soil (sandy dry)	10 GHz	2.5 + i 0.005	5.1%	loaded plastic	520 GHz	2.66 + i 0.065	5.8%
Soil (moist)	10 GHz	3.2 + i 0.19	8.0%	loaded plastic	160 GHz	3.23 + i 0.18	8.2%
Asphalt	10 GHz	4.28 + i 0.1	12.1%	loaded plastic	160 GHz	4.2 + i 0.13	11.9%
Concrete	35 GHz	2.5 + i 0.65	5.8%	loaded plastic	520 GHz	2.59 + i 0.16	5.5%

Windshield glass	10 GHz	5.9 + i 0.15	17.3%	Schott AF-45	520 GHz	5.90 + i 0.33	17.4%
Soda-borosilicate	25 GHz	4.65 + i 0.042	13.4%	Boron Nitride	520 GHz	4.84 + i 0.004	14.1%
Fused quartz	3 GHz	3.78 + i 0.0002	10.3%	Fused Quartz	520 GHz	3.78 + i 0.01	10.3%

Douglas fir	3 GHz	1.82 + i 0.047	2.2%	Balsa Wood	520 GHz	1.99 + i 0.051	2.9%
Mahogany	3 GHz	1.88 + i 0.047	2.5	Balsa Wood	520 GHz	1.99 + i 0.051	2.9%
Yellow birch	3 GHz	2.13 + i 0.07	3.5%	Balsa Wood	520 GHz	1.99 + i 0.051	2.9%

Butyl rubber	3 GHz	2.35 + i 0.002	4.4%	HD Polyethylene	520 GHz	2.31 + i 0.002	4.3%
Tank Track Pad	10 GHz	11.3 + i 1.85	29.7%	loaded plastic	160 GHz	11.3 + i 1.1	29.5%
Tank Side Skirt	10 GHz	2.5 + i 0.047	5.1%	Plexiglass	160 GHz	2.59 + i 0.02	5.5%
M-35 Tire	10 GHz	6.9 + i 0.56	20.2%	loaded plastic	160 GHz	6.9 + i 0.53	20.2%
SA-9 Tire	35 GHz	7.7 + i 0.38	22.1%	loaded plastic	520 GHz	7.6 + i 0.5	22.1%

E-glass/epoxy	10 GHz	4.5 + i 0.01	12.9%	Boron Nitride	520 GHz	4.84 + i 0.004	14.1%
E-glass/polyest.	10 GHz	4.1 + i 0.06	11.5%	Boron Nitride	520 GHz	4.84 + i 0.004	14.1%
Kevlar 49-polyest.	10 GHz	3.4 + i 0.07	8.8%	Polyimide	520 GHz	3.50 + i 0.07	9.2%
*STL maintains an extensive database of dielectric properties of materials from 1 GHz to 3 THZ, as well as the capability to measure these properties. Please contact STL for information on materials that do not appear on this list.

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